Wohler DM 602 Digital Manometer User Manual
- June 4, 2024
- WOHLER
Table of Contents
Operating manual
Digital Manometer 
General Information
1.1 Start-up when delivered with optional battery pack
The bottom part of the battery module Wöhler M 602, lever marked by an arrow
If your unit is operated with a rechargeable battery and not with batteries (optional), the transport lock is set during delivery so that the unit cannot be switched on.
- In this case, open the battery compartment on the back of the unit.
- Move the small black lever at the bottom of the battery module from the off position to the on position.
This procedure is only necessary before using the unit for the first time.
1.2 Manual information
This operation manual allows you to safely work with the Wöhler DM 602. Please
keep this manual for your information.
The Wöhler DM 602 Pressure Gauge should be employed by professionals for its
intended use only.
Liability is void for any damages caused by not following this manual.
1.3 Notes
WARNING!
Not following this warning can cause injury or death.
ATTENTION!
Not following this note can cause permanent damage to the device.
NOTE!
Useful information
1.4 Intended Use
The Wöhler DM 602 is used for differential pressure and temperature
measurements.
In particular, it can be used to set the gas pressure on gas fireplaces,
measure the fan differential pressure, and measure the chimney draught.
1.5 Basic equipment
| Unit | Scope of supply |
|---|---|
| Wöhler DM 602 | Wöhler DM 602 Pressure Gauge |
2 batteries 1,5 V
| Hand strap
| Measuring Hose 1,5 m
1.6 Hand strap
Fixing the hand strap under the battery compartment
If you want to use the hand strap included in the delivery, mount it as follows:
- Remove the battery cover on the back of the unit.
- Hang the loop on the small hook below the batteries.
- Close the battery cover.
1.7 Information on disposal
Electronic equipment does not belong in domestic waste, but must be disposed
of in accordance with the applicable statutory provisions.
You may hand in any defective batteries taken out of the unit to our company
as well as to recycling places of public disposal systems or to selling points
for new batteries or storage batteries.
1.8 Manufacturer
Wöhler Technik GmbH
Wöhler-Platz 1
33181 Bad Wünnenberg
Tel.: +49 2953 73-100
E-Mail: [email protected]
Specifications
2.1 Measured values
Differential Pressure
| Description | Data |
|---|---|
| Default unit | Pa, bar, or in, depending on the device version |
| Range | ± 3.000 hPa |
| Permissible overload | ± 3.200 hPa |
| Precision | < 3 % of reading, when < ± 2 hPa better than ± 0,06 hPa |
| Resolution | 0,01 hPa |
when –210 hPa to
+210 hPa, otherwise 0,1 hPa
Internal temperature measurement
| Description | Data |
|---|---|
| Default unit | °C or °F, depending on the device version |
| Range | -20 °C to 60°C |
| Precision | < ± 1 °C |
| Resolution | 0,1°C |
External Temperature Measurement
(e.g. with temperature measuring clamp )
| Description | Data |
|---|---|
| Range | -20,0 °C to +800,0 °C |
| Precision | < ± 1 °C |
when -20°C to 67°C, otherwise 1,5 % of reading according to EN 50379-1
Resolution| 0,1°C
2.1 Technical Data
| Description | Data |
|---|---|
| Power Supply | 2 batteries 1,5 V, AA LR6 |
| Power supply (option) | Lithium polymer battery 3,7 V, 700 mAh, Charging via |
USB-C cable
Battery Charging Cycles (option)| After 500 charging cycles, at least 70 % of
the capacity is still available.
Battery charging time (option)| 4 h
Operating time of the rechargeable battery (option)| 38 h
Auto Off Function| After 1 hour (can be deactivated in the settings)
Storage Temperature| -20 °C to + 50 °C
Operating Temperature| +5 °C to 40 °C for compliance with the accuracies
Weight| 140 g
Dimension| 170 x 47 x 29 mm
Component explanation
Figure 3:
Wöhler DM 603 Digital Manometer
| Button (1) | Press Button | Funktionen |
|---|---|---|
| __ | 3 seconds | on/off |
| Measuring mode | briefly | zero the pressure sensor |
| double click | print measuring data on thermoprinter | |
| Settings mode | briefly | select unit / solution / display lighting |
| double click | confirm setting | |
| Number | Function | |
| --- | --- | |
| 1 | Button | |
| 2 | USB-C- charging port (option, only with rechargeable battery) | |
| 3 | Display | |
| 4 Pressure socket (right) | Main socket for differential pressure measurement |
(positive)
5 Pressure socket (left)| Reference socket for differential pressure
measurement (negative)
6| Jack for external temperature probe or clamp NiCr-Ni (Type K)
7| The battery compartment on the backside of the unit
8| IR Port (Thermoprinter)
Wöhler DM 602 external temperature sensor
Temperature measurement connection:
For external temperature measurement, any type of K the thermocouple can be
connected, e.g. a temperature clamp or a temperature probe.
- Insert the temperature plug into the temperature socket on the underside of the unit (Abb. 3, part 6).
Switch on unit
Figure 5: Button
WARNING!
Due to the compressibility of gases, the accident prevention regulations
“Working on Gas Installations” and the rules and regulations “Technical Rules
for Gas Installations”must be observed for all pressure tests with air or
inert gas for safety reasons.
- Switch on the unit: Press and hold the button for 2 seconds.
- Switch off the unit: Press and hold the button for 3 seconds.
After switching on, the overall display lights up briefly and then the start
screen lights up for approx. 7 seconds.
During this time, the unit carries out a pressure zeroing.
ATTENTION!
During zeroing, no hose may be connected or no differential pressure applied,
as the unit stabilizes and determines its zero point.
After zeroing the measuring display appears.
Display
In measuring mode, the main display shows the currently measured pressure
value and below the temperature value.
Top line:
Battery level indicator:
- 3 dashes: high battery voltage
- Flashing: very low battery voltage
Middle line:
Actual measured differential pressure
Bottom line:
Internally measured temperature or externally measured temperature (with a
connected temperature sensor or clamp)
The differential pressure is always shown in the display without (+) or (-).
Instead, there is a plus sign (+) under the pressure port through which the
higher value is measured and a minus sign (-) under the pressure port with the
lower value.
Note!
We recommend connecting the overpressure or underpressure to be measured to
the right-hand connection and leaving the left-hand connection open as a
reference connection.
Wöhler DM 602 external temperature sensor
Temperature measurement connection:
For external temperature measurement, any type of K thermocouple can be
connected, e.g. a temperature clamp or a temperature probe.
- Insert the temperature plug into the temperature socket on the underside of the unit.
Settings
- Immediately after switching on, as soon as the battery symbol has appeared in the display and before the measured value display appears, double-click the button.
This will take you to the setting mode.
6.1 Selecting the pressure unit
The display shows „Press unit“.
-
To select the pressure unit, press the button briefly.
The pressure units bar, bar, WC, psi, mmH2O, mH2O, Pa, hPa, kPa, and mPa appear one after the other. -
Confirm the selected unit with a double click.
6.2 Selecting the pressure solution
The display shows „reso“ (resolution).
You can now set the displayed resolution for the pressure. The resolution
refers to the previously selected pressure unit. There are 3 different
resolutions to choose from.
- Press the button briefly to select the desired resolution.
- Confirm the selection with a double click.
6.3 Selecting the temperature unit
The display shows „Temp. unit“.
You can now select between the temperature units °C or °F.
- To change between °C and °F press the button briefly.
- Confirm the selection with a double click.
6.4 Switching the display lighting on/off
The display shows „Light on“.
- Press the button briefly to switch the display lighting on and off again.
- Confirm the selection with a double click.
6.5 Auto-Off Function
“Auto Off” appears on the display.
The unit switches off automatically after one hour if no key has been pressed.
This auto-off function can be deactivated at this point.
- Press the operating key briefly to switch between “Auto Off” (automatic switch-off activated) and “Ever ON” (automatic switch-off deactivated).
- Confirm your selection with a double click.
The display then switches back to the start screen for a few seconds and then to the measuring mode.
Changing the batteries
- Switch off the unit.
- Remove the battery cover from the backside of the unit.
- Replace the batteries with 2 new 1.5 V AA LR6 batteries.
- Observe the correct polarity according to the labeling in the battery compartment.
Maintenance
| Interval | Maintenance work |
|---|---|
| When necessary (user) | Clean the housing with a damp cloth and mild detergent. |
| 1x per year (factory) | Send the unit to one of our service centers for in- |
section and calibration.
Accessories
| Draught probe with hose and cone | Art. no. 4578 |
|---|
Service work on gas pipes
| Pressure Measurement Set for Wöhler Digital Manometer | Art. no. 56126 |
|---|---|
| High-pressure plug ½ “ and 1“ | Art. no. 7213 |
| Hose set with measuring hose Ø 8 mm for measurements up to1.5 bar | Art. no. |
11341
Temperature
| Clamp temperature sensor type K K | Art. no. 62616 |
|---|
Printer
| Wöhler TD 100 Thermal Printer | Art. no. 4160 |
|---|---|
| Thermal Paper, 10 rolls | Art. no. 4145 |
Warranty and Service
10.1 Warranty
Each Wöhler Digital Manometer DM 602 will be tested in all functions and will
leave our factory only after extensive quality control testing. The final
control will be recorded in detail in a test report and delivered with any
unit.
If used properly, the warranty period for the Wöhler DM 602 will be twelve
months from the date of sale. Not covered by the warranty are batteries and
defects of the pressure sensor caused by overpressure.
Service by non-authorized personnel or making modifications to the unit void
any warranty.
10.2 Service
Wöhler has built our reputation on excellence in customer service. Therefore, of course, we are readily available to assist you after the warranty period ends.
- Send us the device, and we will repair it and return it to you with our package service.
- Immediate help is provided by our technical staff over the telephone.
Declaration of conformity
The manufacturer:
WÖHLER Technik GmbH
Wöhler-Platz 1, D-33181 Bad Wünnenberg declares that the product:
Product Name: Wöhler DM 602 Digital Manometer
complies with the key safety requirements set down in the guidelines of the
Council for the Harmonization of the Legal Requirements of the Member States
in relation to the
electromagnetic compatibility 2014/53/EU and 2014/30/EU.
The following standards were availed to evaluate the product in respect of
electromagnetic compatibility:
EN 55011:2016 + A1:2017
EN 55032:2015
EN 61000-4-2:2009
EN 61000-4-3:2006 + A1:2008 + A2:2010
Bad Wünnenberg, 06.07.2022
Dr. Stephan Ester, Geschäftsführer/Managing Director
Short Guide
| Mode | Press button | Function |
|---|---|---|
| Every mode | 3 s | on/off |
Measuring mode
| briefly| zero the pressure sensor
double click| print measuring data on thermoprinter
Settings mode
| briefly| select unit / solution / display lighting
double click| confirm setting
Best.-Nr. 24991– 2022-08-05
Documents / Resources
|
Wohler DM 602 Digital
Manometer
[pdf] User Manual
DM 602, Digital Manometer, DM 602 Digital Manometer
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